Item Tag: Oktjabr- Vinnitsa

8pcs. in lot NEW TUBES Made in USSR This tubes never been used 6F5PTriod-pentode.It is designed to work in the blocks of vertical scanning of wide-scale television devices with a beam deflection angle of 110 °.6f5p valves work great in tube amplifiers. The sound is similar to the 6f3p sound, but these valves have different pin configurations in the socket.Durability is not less than 3000 h.Weight not more than 20 g. The main technical characteristics of 6F5P:The heating voltage …… 6.3 ± 0.6 VGlow current …… 900 mA Triodic part:The anode voltage is nominal (constant) …… 100 VAnode voltage limit (constant) …… 250 VAnode current …… 5.5 mAThe cathode current is the limiting (average value) …… 15 mAThe cathode current is the limiting (pulse amplitude) …… 200 mAPower dissipated by the anode, limiting …… 0.5 WThe voltage between the cathode and the heater is the limiting (constant) …… 100 VSlope of the characteristic …… 7 mA / VGain factor …… about 70Resistance in the cathode circuit for automatic biasing …… 160 OhmThe resistance in the grid is the ultimate limit: – with automatic displacement …… 3.3 MΩ – at a fixed bias …… 1 MΩInput capacity …… 3.5 pFOutput capacity …… 0.25 pFThroughput capacity …… not more than 1.8 pF Pentod part:The anode voltage is nominal (constant) …… 185 VAnode voltage limit (constant) …… 300 VAnode voltage limit (pulse amplitude) …… 2 kVAnode current …… 41 mACathode limiting current …… 75 mAThe grid voltage is the second rated (constant) …… 185 VThe grid voltage is the second limiting (constant) … 250 VThe current of the grid is the second …… about 2.7 mAPower dissipated by the anode, limiting … 9 WThe power dissipated by the grid is the second, the limiting …… 2 WSlope of the characteristic …… 7.5 mA / VInternal resistance …… about 23 kΩResistance in the cathode circuit for automatic bias …… 340 OhmThe resistance in the grid circuit is the first limit: – with automatic displacement …… 2.2 MΩ – at a fixed bias …… 1 MΩInput capacity …… 11,7 pFOutput capacity …… 8.8 pFThroughput capacity …… not more than 0,6 pFCapacity between the anodes …… not more than 0.4 pFThe decoration …… is a glass miniature. Note: I don’t match valves in pairs or quartets. There is no valve combination in the lot price. These valves have similar valves from European manufacturer. But be careful. Please don’t use datasheets of similar valves from the West. Valves from the USSR have their own datasheets and a correct valve test could only be done with their own datasheets (but not analog datasheets from similar valves). The valves can be manufactured in different years. Valve pins may be dark and have some scratches. Please remember that the valves were made 40-70 years ago. The inscriptions on the valve cylinders may be dull or half-worn. IMPORTANT INFORMATION! BE SURE TO READ BEFORE ORDERING! In the title of the lot is the name of the vintage Soviet tube and after the symbol ~ the name of the Western analog. Be careful! Soviet tubes are only approximate analogs of Western tubes and match pinout, but are not exact copies of Western tubes. Testing Soviet tubes with Western-made tube testers can sometimes show unreliable results. Programs (Cards) designed for testing Western tubes can sometimes show unreliable results and erroneously show that the tube is not good enough. But these are unreliable results and should be disregarded. The volt-ampere characteristics of Soviet tubes are different from their Western analogs!Use for testing exclusively testers with programs for testing Soviet tubes. If you would like to get the datasheet for the Soviet tubes in this lot, please send me a message before you place your order and I will send you a JPG datasheet for the Soviet tube. Also, do not test vintage tubes with modern digital pulse powered tube testers. Use only testers with a classic power supply. For reliable measurement results, warm up each tube for at least 5 minutes prior to measurement. I do not accept any claims on the quality of tubes if you test purchased Soviet tubes of this lot on testers with programs (modes) of testing Western tubes or test tubes on digital testers with pulse power supply.Dear customer, you can combine shipping buying more than one lot. If You need more than one lot, or another quantity – please contact. Also please check other available items. Thanks in advance!